US Bridges

Rp IS170W to IS70W over Is 170

Fair

St. Louis County, Missouri · S 656 T 46 N R 6 E · Structure no. 2568

Built
1981
44 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
195 ft
3 main spans
Daily traffic
6,698
2024 count
Owner
State
State Highway Agency

About this bridge

Rp IS170W to IS70W over Is 170 is a steel continuous stringer/multi-beam or girder carrying Rp IS170W to IS70W over Is 170 in St. Louis County, Missouri. It was built in 1981, so it is 44 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 6,698 vehicles a day, roughly 1% of them trucks, projected to reach 8,373 by 2044. The structure is 195 ft (59.4 m) long and 35 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesRp IS170W to IS70W
CrossesIs 170
LocationS 656 T 46 N R 6 E
RouteState Highway 0
CountySt. Louis County
StateMissouri
Coordinates38.73252, -90.33303
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating80.4 US tons
Inventory rating48.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length195 ft (59.4 m)
Longest span104 ft (31.8 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,698 (2024)
Projected traffic8,373 by 2044
Trucks1%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Rp IS170W to IS70W over Is 170 built?

It was built in 1981, making it 44 years old in 2025.

What condition is Rp IS170W to IS70W over Is 170 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does Rp IS170W to IS70W over Is 170 carry?

About 6,698 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Rp IS170W to IS70W over Is 170?

The structure is 195 ft (59.4 m) long with a longest span of 104 ft (31.8 m) and a deck 35 ft wide.

Who owns Rp IS170W to IS70W over Is 170?

It is owned by the State Highway Agency.